tag:blogger.com,1999:blog-7771280019069306793.post530263225422580199..comments2023-11-25T23:44:00.846-08:00Comments on PlanetaryGear: Arduino Thermostat part 1James Sentmanhttp://www.blogger.com/profile/10096137208772960623noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-7771280019069306793.post-76401686794414831122013-03-24T16:03:04.441-07:002013-03-24T16:03:04.441-07:00thanks so much for your response. i have lots of ...thanks so much for your response. i have lots of programming experience but little in electronics design (but i'm a quick learner and making good progress). i have already implemented those isolation techniques described in the link you provided. i have been researching techniques/circuits for suppression such as the caps you suggested and that's my next step, as well as perhaps a MOV. thanks again!Anonymoushttps://www.blogger.com/profile/11135375893227697233noreply@blogger.comtag:blogger.com,1999:blog-7771280019069306793.post-46010941194233895902013-03-24T10:17:11.697-07:002013-03-24T10:17:11.697-07:00I haven't seen any of those specific boards bu...I haven't seen any of those specific boards but many isolated systems still manage to connect the grounds together and can let the spikes from the relays affect the computer. I know with arduino boards it's quite easy to get them to reset themselves due to power noise. i'd start by adding another cap across the power input to the controller, at least 100uf and maybe another one on the relay board too. I did find this discussion where they are talking about the YwRobot cards. This specific entry the fellow is discussing how to cut a jumper to fully isolate the relay power from the logic grounds. Perhaps that is also a good place to start if it's the same board as you've got. http://arduino.cc/forum/index.php?PHPSESSID=bcc4e07809fb8308a625e3ce5a3a905a&topic=72507.msg807352#msg807352James Sentmanhttps://www.blogger.com/profile/10096137208772960623noreply@blogger.comtag:blogger.com,1999:blog-7771280019069306793.post-884524736618083032013-03-24T04:41:16.935-07:002013-03-24T04:41:16.935-07:00A question for you if you don't mind? I'v...A question for you if you don't mind? I've got a CAI Webcontrol board running as a thermostat with the furnace wires attached to one of those YWRobot 5v relay boards with optical isolation (like http://www.amazon.com/gp/product/B0057OC5WK but not exactly). Anyway, i am getting EMI such that often when the furnace kicks on or off, the control board resets. Any ideas as to how to further isolate the control board? I thought such a relay board would be enough. The board gets its power separately from a wall wart. Thanks in advance, will be following your blog.Anonymoushttps://www.blogger.com/profile/11135375893227697233noreply@blogger.com